
“What then is, generally speaking, the truth of history? A fable agreed upon.”
Conversation with Emmanuel, comte de Las Cases (20 November 1816), Mémorial de Sainte Hélène, v. 4, p. 251 http://books.google.com/books?id=945jAAAAMAAJ&vq=%22fable%20agreed%20upon%22&pg=PA251. However, the phrase predates Napoleon. Helvétius attributes it to Bernard le Bovier de Fontenelle, De l'esprit (1758), p. 443 http://books.google.com/books?id=N7g8AAAAcAAJ&vq=%22fable%20convenue%22&pg=RA1-PA443